Stanford Medicine News Center Latest Articles Eradicating liver tumors Liver Cancer April 24, 2025 By Krista Conger “Cold” tumors are resistant to common immunotherapies. Stanford Medicine researchers have uncovered a master regulator that can be manipulated to prevent tumor growth in mice. Editor's note: Above left: In “cold” immunotherapy-unresponsive tumors, tumor cells make EPO, which binds to receptors on macrophages. By removing or blocking macrophage EPO receptors, scientists can make tu...